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Article
Publication date: 13 February 2023

Mehmet Altuğ

The purpose of this study was conducted at an enterprise that produces fasteners and is one of the leading companies in the sector in terms of market share. Possible defects in…

359

Abstract

Purpose

The purpose of this study was conducted at an enterprise that produces fasteners and is one of the leading companies in the sector in terms of market share. Possible defects in the coating of bolts and nuts either lead to products being scrapped or all of the coating process being repeated from beginning to end. In both cases, the enterprise faces a waste of time and excessive costs. Through this project, the six sigma theory and its means were effectively used to improve the efficiency and quality management of the company. The selection of the six sigma project has also contributed to the creation of various documents to be used for project screening and evaluation of financial results.

Design/methodology/approach

Six sigma is an optimization strategy that is used to improve the profitability of businesses, avoid waste, scrap and losses, reduce costs and improve the effectiveness of all activities to meet or exceed customers’ needs and expectations. Six sigma’s process improvement model, known as Definition-Measurement-Analysis-Improvement-Control, contributes to the economic and technical achievements of businesses. The normal distribution of a process should be within ±3 sigma of the mean. This represents a scale of 99.7% certainty. However, improving the process through the utilization of the six sigma rule, which accepts normal variabilities of processes twice as strict, will result in an error rate of 3.4 per million instead of 2,700 per million for each product or service.

Findings

Using six sigma practices to reduce the costs associated with low quality and to increase economic added value became a cultural practice. With this, the continuation of six sigma practices throughout the Company was intended. The annual cost reduction achieved with the utilization of six sigma practices can be up to $21,780. When time savings are also considered, a loss reduction of about $30,000 each year can be achieved. The coating thickness efficiency increased from 85% to 95% after the improvements made through the six sigma project. There is a significant increase in the efficiency of coating thickness. In addition, the coating thickness efficiency is also close to the target value of 95%–97%.

Originality/value

The results of the study were optimized with the help of deep learning. The performance of the model created in deep learning was quite close to the actual performance. This result implicates the validity of the improvement work. The results may act as a guide for the use of deep learning in new projects.

Details

International Journal of Lean Six Sigma, vol. 14 no. 7
Type: Research Article
ISSN: 2040-4166

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Article
Publication date: 3 October 2024

Mehmet Kivanc Turan, Muhammet Üsame Sabirli, Altug Bakirci, Emirhan Kartal and Fatih Karpat

This study aims to investigate the effects of five different printing parameters, namely, printing speed (PS), printing temperature/nozzle temperature/extrusion temperature…

131

Abstract

Purpose

This study aims to investigate the effects of five different printing parameters, namely, printing speed (PS), printing temperature/nozzle temperature/extrusion temperature, heated-bed temperature, raster angle (RA) and layer height (LT), on mechanical properties.

Design/methodology/approach

American Society for Testing and Materials (ASTM) standards were used for the specimen design. Then, the Taguchi method was used for the design of the experiment and an L16 orthogonal array was preferred. Tensile, Shore D and surface roughness tests were conducted on polylactic acid test specimens. The test results were analyzed using the signal-to-noise ratio and analysis of variance (ANOVA).

Findings

As a result of the study, it was seen that RA is the most important parameter for the tensile strength, PS is for the hardness and LT is for the surface roughness. According to the ANOVA results, the effects of the RA, PS and LT on the maximum tensile strength, hardness and surface roughness were 41.59%, 69.51% and 44.6%, respectively.

Originality/value

To the best of the authors’ knowledge, this study is one of the most comprehensive parameter optimization studies for additive manufacturing in the literature because it includes five different printing parameters and three mechanical test procedures.

Details

Rapid Prototyping Journal, vol. 31 no. 1
Type: Research Article
ISSN: 1355-2546

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Book part
Publication date: 30 July 2018

İ. Taylan Dörtyol, Ayşen Coşkun and Olgun Kitapci

Consumption is a way of communication whereby consumers express, position or/and differentiate themselves within their society or affiliated groups. A great part of consumers’…

Abstract

Consumption is a way of communication whereby consumers express, position or/and differentiate themselves within their society or affiliated groups. A great part of consumers’ lives are spent on various purchase activities, and many would be eager to understand the factors underlying those behaviours.

This chapter primarily deals with the cultural, social, psychological and personal factors that affect consumer behaviour. Each of these factors in relation to consumer behaviour is discussed in detail. The types of consumer buying behaviours and the consumer decision-making processes then provide the fundamentals of the topic along with their relevance to Turkish consumers.

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Book part
Publication date: 20 April 2023

İnci Aksu Kargın

In our global world, international cooperation has vital importance when addressing humanitarian disasters. Today, as the majority of refugees live in the Southern countries…

Abstract

In our global world, international cooperation has vital importance when addressing humanitarian disasters. Today, as the majority of refugees live in the Southern countries proximate to their homelands, neighboring countries are predominantly the ones that carry the bulk of the refugee burden. Under certain circumstances, states engage in international cooperation in managing refugee crises; to this end, this study analyzes the motivations behind the signing of the 2016 European Union (EU)–Turkey refugee deal and its outcomes for both parties. Past research has shown that the 2015 refugee crisis in Europe demonstrated that the initiatives that the EU countries embarked upon to pursue a monolithic policy against this mass flow fell short and, therefore, enhanced Turkey's leverage with Europe, which provided Turkey with the ability to gain concessions in bilateral talks. However, this study claims that the EU member countries were in a more advantageous position compared to Turkey as a consequence of signing the refugee deal, and it is better to characterize the deal between the parties as burden-shifting rather than burden-sharing. In addition, although the inflow of approximately one million refugees to European shores panicked the European states and coerced most of them to return to their own national migration policies, this study shows that no concrete concessions were provided to Turkey to manage this massive flow. The provisions of the Deal were not the extraordinary payoffs that EU member countries offered Turkey to fight against the irregular migration, but the extension of EU's traditional migration policy.

Details

The European Union in the Twenty-First Century
Type: Book
ISBN: 978-1-80382-537-3

Keywords

Available. Content available
Book part
Publication date: 30 July 2018

Abstract

Details

Marketing Management in Turkey
Type: Book
ISBN: 978-1-78714-558-0

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Article
Publication date: 24 July 2019

Nazife Karamullaoglu and Ozlem Sandikci

This purpose of this paper is to explore how Western design, fashion and aesthetic styles influenced advertising practice in Turkey in the post-Second World War era. Specifically…

492

Abstract

Purpose

This purpose of this paper is to explore how Western design, fashion and aesthetic styles influenced advertising practice in Turkey in the post-Second World War era. Specifically, the authors focus on the key targets of the consumerist ideology of the period, women and discuss the representations of females in Turkish advertisements.

Design/methodology/approach

Data were analysed using a combination of social semiotic and compositional analysis methods. Compositional analysis focused on the formal qualities and design elements of the ads; social semiotic analysis sought to uncover their meaning potentials in relation to social, cultural, political and economic dynamics of the period. The advertisements of a prominent Turkish pasta brand, Piyale, published in the local adaptation of the American Life magazine, between 1956 and 1966, constitute the data set.

Findings

The analysis reveals that Piyale followed the stylistic and thematic trends prevailing in American and European advertisements at the time and crafted ads that constructed and communicated a Westernized image of Turkish women and families. In line with the cultural currents of the 1950s and 1960s, the ads emphasize patriarchal gender roles and traditional family values and address the woman as a consumer whose priority is to please her husband and take good care of her children.

Originality/value

This study contributes to the advertising history in non-Western contexts and provides an understanding of the influence Western advertising conventions and fashion trends had on developing country markets. The findings indicate that Western-inspired representations and gender roles dominated advertisements of local brands during the post-war period.

Details

Journal of Historical Research in Marketing, vol. 12 no. 1
Type: Research Article
ISSN: 1755-750X

Keywords

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